Usually, when someone or something retires, it's because they've grown a little older — and maybe a little slower — over time. Maybe their skills aren't as useful as they once were, so they opt to spend their sunset years peacefully watching others take over their old duties.

But not the SR-71 Blackbird. It went out with a sonic boom.

The SR-71 was in the prime of its amazing life. This was a titanium bird designed to outrun and spy on the Russians, a bird that was fooling Russians even before it was assembled.

When the Blackbird was retired in 1990, not everyone was thrilled with the idea. Much of the debate around the SR-71's mission and usefulness was because of political infighting, not because of any actual military need the plane couldn't fill. Still, the program was derided by Congressional military and budget hawks as being too costly for its designated mission. Some speculate the old guard of Air Force Cold Warriors had long since retired and newer generals couldn't explain the plane's mission in the post-Soviet order.

Whatever the reason for its retirement, the Air Force's most glorious bird was headed for the sunset — but not before making history and setting a few more records.

When it was operationally retired in 1990, a Blackbird piloted by Lt. Col. Raymond E. Yeilding and Lt. Col. Joseph T. Vida was tasked to fly one last time from Palmdale, Calif. to its new home at the Smithsonian Institution's Steven F. Udvar-Hazy Center in Chantilly, Virginia. Apparently, they had somewhere to be in the D.C. area that day, too.

2. Los Angeles, Calif., to Washington, D.C. – 2,299 miles in 64:20.

3. Kansas City, Mo., to Washington, D.C. – 942 miles in 25:59.

4. St. Louis, Mo., to Cincinnati, Ohio – 311 miles in 8:32.

The SR-71 refueled in mid-air over the Pacific Ocean before beginning its transcontinental journey. It arrived at Dulles International Airport to a throng of onlookers and well-wishers who knew a good thing when they saw one.

Addressing the full Senate after the historic, record-setting 1990 flight, Senator John Glenn told the assembly that the flight would be remembered as "a sad memorial to our short-sighted policy in strategic aerial reconnaissance."